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. Author manuscript; available in PMC: 2013 Jul 22.
Published in final edited form as: Ear Hear. 2012 Mar-Apr;33(2):195–208. doi: 10.1097/AUD.0b013e31823235b5

Figure 1.

Figure 1

Power reflectance ℛ measurements demonstrating examples of stability and changes within a preparation. LEFT: Three measurements with the ear in the normal condition, taken three to five minutes apart, demonstrating stability of the preparation. CENTER: Seven measurements with the ear in the normal condition, taken three to five minutes apart, demonstrating an unstable preparation. RIGHT: Two measurements taken in succession on an ear in the normal state but with the Eustachian tube (ET) open in one measurement and closed in the other measurement.